<template>
  <div class="login_container">
    <div class="login_box">
      <!-- logo区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <!-- 表单区域 -->
      <el-form
        ref="loginFormRef"
        :rules="loginFormRules"
        :model="loginForm"
        class="login_form"
        label-width="0"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            prefix-icon="iconfont icon-user"
          >
          </el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            placeholder="请输入密码"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          >
          </el-input>
        </el-form-item>
        <!-- 表单按钮项 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录表单要的数据
      loginForm: {
        username: '',
        password: ''
      },
      // 表单验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 5, max: 10, message: '长度在 5 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 5, max: 10, message: '长度在 5 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置登录表单
    // this.$refs.loginFormRef为实例对象
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    // 登录验证
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
  display: flex;
  justify-content: center;
  align-items: center;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  position: relative;

  .avatar_box {
    position: absolute;
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    left: 0;
    top: -100%;
    right: 0;
    bottom: 0;
    margin: auto;
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
